Mercedes-Benz Problems

The good news for you, Jenny, is that there isn’t really a mainstream car-maker anywhere in the world that doesn’t offer a range of SUVs in various sizes and price points. The SUV has literally taken over the world, so it comes down to finding a brand you like with a model that’s right for you at a price you can live with. You’ll be offered all sorts of options, too, including petrol or diesel engines, two or four-wheel-drive layouts and in many cases the offer of a hybrid drivetrain.

If you only do the occasional country drive, I’d stick with either a petrol engine or hybrid powertrain as a modern diesel engine doesn’t like a full-time life in the suburbs where the engine and exhaust system never get hot enough to purge the emissions filter (the DPF). Beyond that, however, you’re sure to find something that suits you to a tee. Lexus SUVs are built to a very high standard and the brand has lots of experience with hybrids, so I’d definitely short-list Lexus based on your question.

If the transmission is working properly between bouts of slippage, then it’s reasonable to think that this could be an electronic problem rather than a mechanical one. By turning the ignition off and then restarting, you’re effectively resetting the computer that controls the transmission. That’s why the gearbox comes good for a period before reverting to its old tricks.

That’s on the surface, anyway, but the problem could also be within the torque converter or something intermittent inside the actual gearsets, clutches, bands or valve body that is giving the same set of symptoms.

Ultimately, this is probably going to require a trip to a transmission specialist who will be able to identify the cause more accurately. In the meantime, though, there’s something you can try that might reset the transmission more permanently. On this model Mercedes-Benz, there’s a specific transmission-reset procedure that should take the gearbox back to its original factory settings. If that’s the case, it might fix your problem, but if not, then you need to call in the experts.

The procedure starts with getting in the car, closing all the doors and turning the ignition key to the on position, but not actually starting the engine. You should have all the dashboard lights illuminated at this point. Then, press the accelerator pedal right to the floor, making sure you can feel that the kick-down détente has been activated. Hold the pedal all the way down for at least 60 seconds and then, without releasing the accelerator, turn off the ignition. Don’t open the door and don’t remove the key from the ignition. Now release the accelerator and wait five minutes before starting the engine and going for a test drive.

Good luck.

Both the existing Genesis G90 (and its closely related Kia K9 sedan) are flagship models not available in Australia due to the tiny pool of buyers that swim in the upper-luxury segment dominated by the Mercedes-Benz S-Class.

The main stumbling block is probably the prohibitive cost of engineering these left-hand-drive market models for right-hand-drive. At over 5.2 metres long (and counting if you include the limo version), these are way too large for British roads, and the expected sales volumes from the rest of the right-hand-drive countries combined including Australia just doesn't make a viable business case for them.

Plus, big luxury SUVs are where the customers are heading, so a luxury crossover flagship from fledgling Genesis would make much more sense anyway. Sorry, but please don't hold your breath for a G90 in Australia any time soon.

However, the all-electric G80 – Genesis' big 5 Series-priced rival – is said to be heading Downunder inside the next 12 months. The EV limo is the brand’s first fully electric model and will have “more than 500km range” to take on the coming Mercedes-Benz EQS electric luxury flagship sedan.

Mitsubishi’s L300 Express was available as a four-wheel-drive model way back in the 1980s (83 to 86) and was a very popular van to convert for camping thanks to that all-wheel-drive grip that allowed it to tackle rough roads with little problem. After 1986, a few of the later model Express 4WD vans (often badged Delica) made it into Australia as private imports, and there are a few of them around now to choose from.

The requirement to be able to stand up inside the vehicle will limit your choices a little, but popular vans like the Toyota HiAce, Ford Transit and Mercedes-Benz Vito were available in a high-roof configuration. Even though they lacked all-wheel-drive, generally rugged construction means they should cope with dirt roads pretty well. They just won’t have the grip for off-road work.

As with any second-hand commercial vehicle, try to find out what it did in its previous life. A van that has been used for hard labour might well be worn out. And don’t forget, nobody bought these things new for anything other than a working life.

If, on the other hand, you’re shipping for a brand-new van, there are plenty of options from Ford, Mercedes, Peugeot, Fiat, Toyota and more. The vast majority of them use a turbo-diesel engine so will be quite economical and many also offer an automatic transmission for ease of driving. Choose the one that suits your intended layout best in terms of side and rear doors and the ability to climb from the front seat into the van area without leaving the vehicle (some have cargo barriers that will prevent this).

If the vehicle has been serviced at a Mercedes-Benz dealer, all the information about that history can be accessed online. Any dealer should be able to tap into that history file and tell you what you need to know. You can also establish (if you haven’t already) a `Mercedes me’ account via the factory website and this will enable you to check out the car’s entire service background. A dealer will be able to help you establish your Mercedes me account.

If you’re after an owner’s manual, there’s one included on the car’s hard-drive if the vehicle is fitted with the Mercedes Command system (which was standard on the Power trim level and optional on the Progressive) which you can access via the info-screen in the dashboard. Failing that, this link will get you top the relevant online subject matter.

Home servicing is a great way to learn about your car and get a better idea of what makes it tick. It also means you might even become a more `mechanically sympathetic’ driver and be kinder to the car in a long-term sense.

The service booklet in the car’s glove-box will tell you a lot about what you need to know when it comes to what’s required for a service. But remember that not all services are the same: Some are minor services and some are major. Others require one-off actions such as changing a timing belt or checking the tension of a timing chain, but you can’t afford to ignore any of these things. Other things required by the factory service schedule include checking the thickness of brake material, changing fluid beyond just the oil and plenty of other tasks that might not occur to you naturally. Most of these tasks are either time or distance-covered dependent (sometimes both).

The bottom line is that you really need to be on top of these tasks and know how to do them before you rip the car apart in the driveway one Saturday and then discover you don’t know how it all goes back together. Home maintenance extends way beyond just oil changing, particularly on a modern design such as the Mercedes A-Class. Modern cars are very complex devices and keeping them running sweetly and safely is often the work of a specialist. That said, I’m loathe to try to dissuade you from tackling a job that can be very satisfying and could save you money in the process.

A lot of TAFE colleges once offered car-maintenance courses for the home mechanic, but sadly, many of these seem to have disappeared due to budget cuts across the education system. It would still be worth talking to your local TAFE, though, to see if there’s a short course that might help you out.

Again, a problem like this is very difficult to diagnose via remote control. You haven’t given me much to go on here, but my first suggestion would be to have the car scanned at a workshop and see what error codes materialise. From there, you can take a much more targeted approach to working out which of the hundreds of possible components is causing the problem. Don’t forget the basics, either, such as contaminated or old fuel in the tank. Modern fuel doesn’t like sitting around in a tank and can `go off’ over time.

You don’t have to fit run-flat tyres to your car, but it can be a lot more convenient. A decade or so ago, it was quite common to replace run-flat tyres with more conventional tyres as the ride quality of run-flats was relatively poor. These days, that isn’t the case to the same extent, and run-flats have come a long way.

But if you can’t get them in the correct size, then you have a problem that can be solved by fitting conventional tyres of the correct size, speed rating and load rating. A tyre shop should be able to sort this out for you.

The catch, of course, is that a conventional tyre won’t get you home if it deflates for any reason (as a run-flat is designed to do). The knock-on problem there is that a car designed for run-flats will not only not have a spare tyre, it won’t even have a physical space to put one. The solution then is to find a repair kit of the type found in many cars today. This amounts to a tin of repair solution which is added to the tyre through the valve and the tyre reinflated with the attached compressor.

Factory options can add to the resale price of a vehicle, but not the full amount that they cost when the car was ordered new. Which means the AMG equipment and vision package will take the vehicle closer to the higher valuation. Some options are more highly valued than others, too, and the AMG package is one of them.

As for aftermarket (or dealership-fitted) options such as ceramic paint treatment, fabric protection and tinted windows, regardless of what the seller tells you, these add very little – if anything – to the resale value.

At this stage, the smallest Mercedes-Benz EV is the EQA. Although there’s a Smart EV in other parts of the world, there are no plans to introduce it here. The decision not to make an A-Class hatchback EV is in line with the rest of the world’s car-makers who are ditching conventional hatchback and sedan designs in favour of the all-conquering SUV packaging.

However, while the EQA is physically larger than your current A250, it’s probably not by as much as you might imagine. In overall length terms, the EQA is about three centimetres longer and about five centimetres wider. The big difference is that the new car is a lot taller; about 19 centimetres higher, in fact. But even then, the EQA is still a pretty compact car, and if your garage won’t accommodate those dimensions, I’m wondering how it was ever council-approved as a parking space within a building.

As for your other requirements, the EQA has a theoretical range of up to 400km and can be fast-charged. As for more charging points in public areas on highways, I’m afraid that’s one you need to talk to your local government member about, not Mercedes-Benz.